I just felt she was finally treating him with the disdain and loathing he so richly deserves.

Yes and he was treating her like some bug he trying to scrape off his shoe.

Point being even the enemy chemistry is gone now so there's no reason to keep annoying us with scenes between them.

Eh. I don't think they have chemistry of any kind, but they live in the same town and are both on the show, so there's no reason to stop them from having scenes altogether.

But there's no reason to put them in a scene just because they're both on the show. I think that may be my problem with these scenes - they felt forced, like they stuck them in a scene just to stick them in a scene. The vibe was off for me.